KR20110135021A - Moving type water purifier apparatus - Google Patents

Moving type water purifier apparatus Download PDF

Info

Publication number
KR20110135021A
KR20110135021A KR1020100054721A KR20100054721A KR20110135021A KR 20110135021 A KR20110135021 A KR 20110135021A KR 1020100054721 A KR1020100054721 A KR 1020100054721A KR 20100054721 A KR20100054721 A KR 20100054721A KR 20110135021 A KR20110135021 A KR 20110135021A
Authority
KR
South Korea
Prior art keywords
water
filter
reverse osmosis
membrane
pump
Prior art date
Application number
KR1020100054721A
Other languages
Korean (ko)
Inventor
김응우
Original Assignee
김응우
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 김응우 filed Critical 김응우
Priority to KR1020100054721A priority Critical patent/KR20110135021A/en
Publication of KR20110135021A publication Critical patent/KR20110135021A/en

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D36/00—Filter circuits or combinations of filters with other separating devices
    • B01D36/02—Combinations of filters of different kinds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2027—Metallic material
    • B01D39/2051—Metallic foam
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/54—Computerised or programmable systems

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Geology (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Water Treatment By Sorption (AREA)

Abstract

PURPOSE: A portable water purifying apparatus is provided to supply plenty of drinking water required for remote areas, islands, and calamity areas in addition to industrial water for plants. CONSTITUTION: A portable water purifying apparatus includes a multi-layered filter, an activated carbon filter, a micro filter, a transferring pump, a reverse osmosis water purifying unit, a cleaning unit, and a controlling panel. The multi-layered filter eliminates the impurities of raw water. The activated carbon filter eliminates volatile organic compounds and harmful bacteria from the water through the multi-layered filter. The micro filter is based on porous powder. The transferring filter transfers filtered water to the reverse osmosis water purifying unit. The reverse osmosis water purifying unit includes a plurality of membrane filters. The cleaning unit periodically supplies raw water to the membrane filters.

Description

Mobile water purifier

The present invention relates to a mobile water purifying apparatus, which supplies industrial water to a local engine power plant or a small and medium-sized business, or is provided with a water purifying apparatus that can be used as an emergency water supply apparatus in mountainous regions, islands or disaster areas in ships, It is made to be movable by a vehicle such as a vehicle.

Industrial water is divided into boiler water, raw water, product treatment water, washing water, cooling water, etc.The industrial water is different in quantity and quality depending on the type of business or use, but generally should be high in quantity, high quality, low temperature, It should be cheap.

On the other hand, if a large amount of industrial water is required for the production of the product, the use of water is directly related to the cost of the product.

For example, seawater is used a lot as cooling water for thermal power and nuclear power, but when seawater is used as cooling water in large quantities, the surrounding seawater concentration changes, which affects the biological resources of the sea area. In general, small and medium-sized enterprises that require high quality water are not suitable for industrial water use due to the location conditions or the characteristics of the product.

On the other hand, in areas where water facilities are inadequate or precipitation is scarce, or where disasters are contaminated with drinking water, it is necessary to purify the water in the layers or rivers in order to use drinking water. In this case, the water purifier must be operated locally within a reasonable time, and it must be able to supply a large amount of water since it is intended for a large number of people.

In addition, the membrane filter used in the water purification device requires a cleaning operation because the surface of the membrane filter is contaminated with negative and positive ions when used for a long time, so the water purification capacity is required. Since it takes a lot, there is a problem that it is not suitable to take a lot of operating costs to configure the water purifier portable.

The present invention is to solve the above problems, it is possible to supply a large amount of drinking water required in mountainous areas or disaster areas as well as high-quality industrial water required by local power plants, small and medium-sized enterprises, etc., and has its own washing device, The object of the present invention is to provide a mobile water purifier having a cleaning function at a low cost, which is embedded in a predetermined space and is capable of remote monitoring.

An object of the present invention described above is a multi-layer filter filled with a filter to remove the contaminants of the intake water; An activated carbon filter in which a filter medium is filled and fine pores are formed to remove harmful bacteria and volatile organic compounds contained in the filtered water through the multilayer filter; A micro filter formed by sintering the porous powder made of a thread-like high molecular material to filter the water filtered through the activated carbon filter and firing at high temperature; A pressure feeding pump for transferring the water filtered through the micro filter to a water purifying apparatus described later; An apparatus for purifying water transferred by the pumping pump, the apparatus comprising: a plurality of membrane filters, and the reverse osmosis water purification apparatus configured to pass the transferred water through the plurality of membrane filters step by step; A cleaning device for periodically supplying a high amount of raw water to the membrane filter to clean the membrane filter of the reverse osmosis water purification device; And it comprises a control panel for controlling the overall operation, is achieved by a mobile water purifier, characterized in that installed in a certain space is movable.

According to the mobile water purifier according to an embodiment of the present invention, as a low-cost model, it is possible to immediately supply a large amount of drinking water required in mountainous regions, islands, and disaster areas as well as high-quality industrial water required by local power plants and small and medium-sized enterprises. In addition, since it is equipped with its own cleaning device and remote monitoring system, it is easy to install, operate and manage, and has an advantage of reducing operating costs.

1 is a schematic diagram schematically showing a water purification system of a mobile water purifier according to an embodiment of the present invention.
2 is a process showing a process for purifying raw water as an embodiment according to the present invention.
3A is a schematic block diagram of a general PLC.
Figure 3b is a block diagram of a remote monitoring system as an embodiment according to the present invention.

Hereinafter, a preferred embodiment of a mobile water purifying apparatus according to an embodiment of the present invention will be described with reference to the accompanying drawings. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description.

In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout the specification.

In addition, the following embodiments are not intended to limit the scope of the present invention, but merely as exemplifications of the constituent elements set forth in the claims of the present invention, and are included in technical ideas throughout the specification of the present invention, Embodiments that include components replaceable as equivalents in the elements may be included within the scope of the present invention.

Example

1 is a schematic diagram schematically showing a water purification system of a mobile water purifier according to an embodiment of the present invention, FIG. 2 is a process diagram showing a process of purifying raw water as an embodiment according to the present invention, and FIG. 3A is a general PLC. Figure 3b is a schematic block diagram of a remote monitoring system as an embodiment according to the present invention.

Mobile water purifier 100 according to an embodiment of the present invention is to recycle some of the wastewater concentrated through the membrane filter back to the membrane filter as shown in Figure 1 to improve the water recovery efficiency (recycle system), An auto flushing system for cleaning the membrane filter is provided to clean the membrane filter periodically.

In more detail, as shown in FIG. 2, the multilayer filter 200 removes contaminants of the collected raw water, and removes suspended substances and organic substances contained in the filtered water through the multilayer filter 200. Activated carbon filter 300, the micro filter 400 for filtering the water filtered through the activated carbon filter 300, and the water filtered through the micro filter 400 to transfer to the reverse osmosis water purification apparatus 600 Reverse osmosis water purification apparatus 600 for purifying the water conveyed by the pump pump (500a, 500b), and the water transported by the pump pump (500a, 500b) in five stages (601 ~ 605), The mobile water purifier 100 includes a cleaning device 700 for flushing the membrane filters 601 to 605 of the reverse osmosis water purification device 600, and a control panel 800 for controlling the overall operation. It is composed.

Here, the multilayer filter 200 may use a media such as slag balls having a size of about 0.1 to 0.15 mm, sand having a size of 0.3 to 0.8 mm, gravel having a size of 5 to 10 mm, and the like. However, the standard and type are not limited thereto and may be variously adopted depending on the site conditions.

In addition, the activated carbon filter 300 is filled with a filter medium and fine pores are formed, by using the adsorption power peculiar to activated carbon can be subjected to a high degree of water treatment such as deodorization of the suspended substance, decolorization, adsorption of organic substances, removal of harmful bacteria, and its specifications and The type is adopted in various ways depending on the site conditions.

In addition, the micro filter 400 is a porous powder made of a polymer material in the shape of a polymer in order to maximize the water purification effect by removing even fine particles of 1㎛ size, such as rust, soil, sand, dust and various other debris It is molded and calcined at a high temperature, the specifications and types are employed in various ways depending on the site conditions.

In addition, the reverse osmosis water purification device 600, for example, by placing five membrane filters (601 ~ 605) in three stages to purify the water filtered through the micro filter 400, wherein the first and second In the first step, two membrane filters 601 to 604 are disposed in parallel, and in the third step, one membrane filter 605 is preferably arranged. The membrane filters 601 to 605 may include heavy metals, bacteria, Organic chemical substances or foreign substances dissolved in water with a molecular weight of 200 or more are treated by forced duplexing separation process through ultra-precision semipermeable membrane (0.0001㎛), and the water purification effect is exerted. do.

In this case, the number of membrane filters can be appropriately selected according to the site conditions, and as part of the wastewater concentrated through the membrane filter is recycled back to the membrane filter, the water recovery efficiency is improved.

In addition, the cleaning device 700 is composed of a cleaning pump 720 operationally controlled by a PLC program, the operating cycle and the operating time of the cleaning device 700 can be previously input by the user to the PLC program according to the site conditions have.

In addition, the control panel 800 is to control the overall operation of the present invention, the flow meter (741,941), conductivity meter 631, pH meter 632 and waste water tank valve 742, the treated water tank valve in the present invention 942 and electrically connected to the electronic control device connected to the motor of each pump to control the whole process from raw water intake to process water transfer, switch to switch to the remote control mode using the Internet It is possible to monitor the instrument value on a web browser using the Internet, and it is possible to control the operation of the valve and the motor.

In addition, since the control panel 800 is implemented as a GUI (Graphical User Interface) control system, it is possible to reduce the manufacturing cost with miniaturization, to operate in the form of a graphic touch screen, and to integrate and simplify functions by applying a PLC. It is preferable to make it.

In addition, the mobile water purifier 100 according to the present invention is injected before the water filtered through the micro-filter 400 to the reverse osmosis water purification apparatus 600, injecting antiscalant drugs for preventing the adhesion of scale It can be configured to further include a device, which comprises an antiscalant tank 410 and the antiscalant pump 420, the antiscalant drug is a hydroxyl group ethylene di phosphoric acid (hydroxyl ethylene di phosphoric acid) It is preferable to use chemicals of the system.

In addition, the mobile water purifier 100 according to the present invention, before the water purified through the reverse osmosis water purification apparatus 600 is stored in the treated water tank 900, a chemical for controlling the pH of the purified water It may be configured to further include a device for injecting, the device is composed of a pH chemical tank 610 and the pH pump 620, it is preferable to use sodium hydroxide as a chemical.

Looking at the operation according to an embodiment of a mobile water purification device configured as described above are as follows.

The mobile water purifier 100 according to the embodiment of the present invention is installed in a predetermined space such as a container, and is moved to an installation site requiring water treatment by a vehicle or a vehicle.

After arriving at the installation site, the water purifying device 100 is separated from the vehicle, and the intake pipe is connected to the raw water and operated.

Here, the raw water introduced through the water intake pipe by the pumping means first passes through the multilayer filter 200. At this time, contaminants, such as suspended matter contained in the raw water is removed.

Thereafter, the water filtered through the multilayer filter 200 passes through the activated carbon filter 300, where harmful bacteria and volatile organic compounds such as viruses contained in the first filtered water are removed.

The water filtered through the activated carbon filter 300 passes through the micro filter 400. At this time, the fine impurities of 1㎛ size, such as rust, soil, sand, dust and various debris, are filtered with a 1㎛ filter.

The water filtered through the micro filter 400 is introduced into the reverse osmosis water purification device 600 by the pressure pumps 500a and 500b, and the spare pump 500b in case the pressure pump 500a is inoperable. It is preferable to further include, wherein the antiscalant drug of the hydroxyl group ethylene di phosphoric acid system is injected to prevent scale adhesion.

The water introduced into the reverse osmosis water purification device 600 is purified by passing through five membrane filters 601 to 605 in three stages, wherein the first and second stages are two parallelly disposed membranes, respectively. Filters 601-604 are used and the last third step is one membrane filter 605.

Therefore, the remaining wastewater treated in the first stage is purified in the second stage, and the remaining wastewater purified in the second stage is purified again in the third stage, thereby increasing the water recovery efficiency. The waste water concentrated through the membrane filters 601 to 605 is recycled back to the membrane filters 601 to 605 by an appropriate amount (for example, 50% of the concentrated water) by the pump pumps 500a and 500b. The recovery efficiency can be increased up to 70%.

The treated water purified by the reverse osmosis water purification device 600 is stored in the treated water tank 900.

At this time, the treated water tank 900 is separated from the water purifier 100 and is movable, having a function of hygiene, watertightness, durability and warmth, preferably a large capacity to store a large amount of treated water.

Finally, the treated water stored in the treated water tank 900 is supplied to the associated facilities such as the boiler and the purifier by the air tanks 950 and 960, the purifier supply pumps 951a and 951b and the boiler supply pumps 961a and 961b, respectively. In this case, it is preferable to provide each one more in preparation for the case in which the pump is inoperable.

On the other hand, when the reverse osmosis water purification apparatus 600 is operated for a long time, the surface of the membrane filter (601 ~ 605) is contaminated with positive, anion components, etc., the water purification capacity is lowered, the cleaning apparatus 700 is operated.

Here, the cleaning device 700 is driven by the cleaning pump 720 to wash the contaminants on the membrane surface by flowing a high capacity feed water to the membrane filter (601 ~ 605) of the reverse osmosis water purification device 600, wherein The operating cycle and the operating time of the cleaning pump 720 can be properly input in advance by the user according to the site conditions.

The wastewater washed with the membrane filters 601 to 605 of the reverse osmosis water purification device 600 by the washing apparatus 700 is transferred to the wastewater tank 740 and stored thereafter, and then is discharged to the outside by the wastewater discharge pump 750. Discharged.

On the other hand, by checking the flow rate through the flow meters (741,941) installed in the pipe connected to the wastewater tank 740 and the treated water tank 900 in the reverse osmosis water purification apparatus 600, it is possible to check the overall operating situation, reverse osmosis pressure constant In the process that the treated water passing through the device 600 is stored in the treated water tank 900, by measuring the pH of the treated water by the pH meter 632, by maintaining a constant pH by adding a chemical such as NaOH, The water quality of the treated water produced through the conductivity meter 631 is managed.

This overall operation can be controlled by a PLC (Programmable Logic Controller) method by a control panel 800 provided at one side of a container (not shown) by being electrically connected to sensors of various measuring instruments or electronic control devices connected to motors and valves. PLC is generally composed of a central processing unit 810, a program memory 820, a data memory 830, an input unit 840, an output unit 850 and a power supply unit 860 as shown in FIG. .

Here, the PLC program input device 841 is a device that writes a program in a PLC-specific program language and inputs it into the program memory 820. The PLC program input device 841 is a program that can be executed by a general-purpose user computer. The input device 842 is a device that outputs a signal such as a switch or a sensor of various measuring instruments 631 and 632. The input device 842 is connected to an input terminal of a PLC, and the output device 851 is a lamp or a solenoid valve 742 or 942. It is a device that is driven by receiving the output of the PLC, and is connected to the output terminal of the PLC.

At this time, the central processing unit 810 of the PLC sequentially executes the programs stored in the program memory 820, and periodically reads input values of the input devices 842 through the input unit 840, and corresponds to the corresponding data memory 830. ), The value recorded in the data memory 830 corresponding to the output device 851 is read, and transmitted to the output device through the output unit 850.

In addition, the present invention is generally operated with an associated equipment such as an engine generator, a boiler, etc., the control panel 800 is provided with a switch for switching from automatic control to remote control using the Internet, when switching to remote control As shown in FIG. 3B, data and operation status of various measuring instruments 631 and 632 that can be checked by the control panel 800 are stored in the PLC server 870 provided separately from the present invention, and the PLC server 870 In addition to the PLC of the present invention mobile water purifier 100, the PLC of the associated equipment such as engine generator, boiler, etc. is connected, and connected to the client 880 of the remote site through the Internet to monitor the data and operation status from the remote site through a web browser And it will be able to control the operation of each motor and the opening and closing of the waste water tank valve 742 and the treatment water tank valve (942).

100: mobile water purifier
200: multilayer filter
300: activated carbon filter 400: micro filter
410: antiscalant tank 420: antiscalant pump
500a, 500b: pressure pump 600: reverse osmosis water purification device
601 ~ 605: membrane filter 610: pH chemical tank
620: pH pump 631: conductivity meter
632: pH measuring instrument 700: cleaning device
720: cleaning pump 740: waste water tank
741: flow meter 742: waste water tank valve
750: wastewater discharge pump 800: control panel
810: central processing unit 820: program memory
830 data memory 840 input unit
841: Program input device 842: Input device
850: output unit 851: output device
860: power supply unit 870: PLC server
880 client 900 treated water tank
941 flowmeter 942 treated water tank valve
950,960: Air tank 951a, 951b: Purifier supply pump
961a, 961b: Boiler Feed Pump

Claims (3)

A multi-layer filter filled with a filter to remove impurities of the intake water;
An activated carbon filter in which a filter medium is filled and fine pores are formed to remove harmful bacteria and volatile organic compounds contained in the filtered water through the multilayer filter;
A micro filter formed by sintering the porous powder made of a thread-like high molecular material to filter the water filtered through the activated carbon filter and firing at high temperature;
A pressure feeding pump for transferring the water filtered through the micro filter to a water purifying apparatus described later;
An apparatus for purifying water transferred by the pumping pump, the apparatus comprising: a plurality of membrane filters, and the reverse osmosis water purification apparatus configured to pass the transferred water through the plurality of membrane filters step by step;
A cleaning device for periodically supplying a high amount of raw water to the membrane filter to clean the membrane filter of the reverse osmosis water purification device; And
A mobile water purifier, comprising a control panel for controlling the entire operation, characterized in that installed in a certain space and movable.
In claim 1,
Mobile water purification device characterized in that the waste water concentrated through the membrane filter is recycled back to the membrane filter by the pressure pump.
In claim 1,
The cleaning device is a mobile water purifier, characterized in that the operating cycle and the operating time is controlled by a PLC program.
KR1020100054721A 2010-06-10 2010-06-10 Moving type water purifier apparatus KR20110135021A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020100054721A KR20110135021A (en) 2010-06-10 2010-06-10 Moving type water purifier apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020100054721A KR20110135021A (en) 2010-06-10 2010-06-10 Moving type water purifier apparatus

Publications (1)

Publication Number Publication Date
KR20110135021A true KR20110135021A (en) 2011-12-16

Family

ID=45502069

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020100054721A KR20110135021A (en) 2010-06-10 2010-06-10 Moving type water purifier apparatus

Country Status (1)

Country Link
KR (1) KR20110135021A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180094207A (en) * 2017-02-14 2018-08-23 (주)필로스 Portable membrane water purifying apparatus using for emergency
US20200369538A1 (en) * 2019-05-21 2020-11-26 Cellmobility, Inc. Copper Foam for Water Purification

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180094207A (en) * 2017-02-14 2018-08-23 (주)필로스 Portable membrane water purifying apparatus using for emergency
US20200369538A1 (en) * 2019-05-21 2020-11-26 Cellmobility, Inc. Copper Foam for Water Purification

Similar Documents

Publication Publication Date Title
KR20080078932A (en) Moving type water purifier with back fresh function
CN105152399B (en) A kind of counter-infiltration container-type sea water desalinating unit and its production hydraulic art
US9908800B2 (en) System and method for wastewater treatment
CN102674590A (en) Method for treating and recycling heavy metal wastewater by double-membrane process
CN205295018U (en) Portable degree of depth water processing system
CN102942265A (en) Whole-membrane-process water treatment integration device
CN101961578B (en) Novel water treatment system
JP2018144032A (en) Water treatment system
CN103030237B (en) Treatment device and treatment method for recycling coal slurry sewage
CN205222857U (en) Reverse osmosis container formula sea water desalination device
CN202430070U (en) Heavy metal wastewater treatment and recycling equipment using two-membrane process
KR100583005B1 (en) Advanced water treatment package system and method therof
CN210030227U (en) Concentration treatment device for chemical nickel plating rinsing wastewater
CN102249372A (en) Immersed ultrafiltration and device and preparation system of pure water
KR20110135021A (en) Moving type water purifier apparatus
CN210457682U (en) Cleaning system of water treatment system based on reverse osmosis membrane
CN106007040B (en) Heavy metal wastewater treatment system and method
CN207002442U (en) A kind of water cleaning systems with backwashing function
CN201380045Y (en) Pretreatment device and reverse osmosis desalination apparatus for desalination of mine water
CN203807251U (en) Seawater pretreatment device
CN105776664A (en) Method for improving efficiency of producing purified water in reverse osmosis mode
CN112520914A (en) Scale inhibition type ultrafiltration water purification system
CN202011799U (en) Pure water purification system for diosmin production
Kang et al. Use of submerged microfiltration membranes for glass industry wastewater reclamation: pilot-scale testing and membrane cleaning
JP2002346562A (en) Method and apparatus for water treatment

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E601 Decision to refuse application